SI8662BD-AS Equivalent & Substitute Parts

Part Overview

The SI8662BD-AS is an automotive-grade general purpose digital isolator manufactured by Skyworks Solutions Inc. This device provides 5000Vrms isolation across 6 channels with capacitive coupling technology, supporting unidirectional signal transmission at 150Mbps data rates. The part is qualified to AEC-Q100 automotive standards and operates across the extended temperature range of -40°C to 125°C. The SI8662BD-AS is currently in active production status with 926 units available in stock. Equivalent substitute parts are identified based on matching isolation voltage, data rate, CMTI performance, supply voltage range, automotive qualification, and package compatibility.

Substiute Parts

SI8662BD-AS

Skyworks Solutions Inc.In Stock: 1034SI8662BD-AS Datasheet

Current PartRFQ

SI8642BD-AS

Skyworks Solutions Inc.In Stock: 1434SI8642BD-AS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI8662BD-AS is determined by the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

• Isolation voltage: 5000Vrms minimum
• Data rate: 150Mbps minimum
• Common Mode Transient Immunity: 35kV/µs minimum
• Supply voltage range: 2.375V to 5.5V compatibility
• Operating temperature range: -40°C to 125°C minimum
• Package type: 16-SOIC (0.295", 7.50mm Width)
• Automotive grade with AEC-Q100 qualification
• Capacitive coupling technology
• Unidirectional channel type

Flexible Parameters (May Differ):

• Number of channels
• Channel configuration (forward/reverse distribution)
• Propagation delay characteristics
• Pulse width distortion
• Rise/fall time specifications

The SI8642BD-AS qualifies as a parametric equivalent substitute based on matching all mandatory parameters. The primary difference is channel count reduction from 6 to 4 channels with a 2/2 forward/reverse configuration versus the 4/2 configuration of the main part.

Parameter Comparison

Engineering Selection Recommendations

Both the SI8662BD-AS and SI8642BD-AS are active production parts with full AEC-Q100 automotive qualification. Selection between these parts depends on application channel requirements:

SI8662BD-AS Selection Criteria:

• Applications requiring 6 isolated channels
• Designs utilizing 4 forward and 2 reverse channel configuration
• Systems where all 6 channels are functionally necessary

SI8642BD-AS Selection Criteria:

• Applications requiring 4 isolated channels maximum
• Designs compatible with 2 forward and 2 reverse channel configuration
• Scenarios where channel count reduction is acceptable
• Higher inventory availability (1398 units versus 926 units)

Both parts maintain identical electrical performance specifications including 5000Vrms isolation, 150Mbps data rate, 35kV/µs CMTI, and propagation delay characteristics. Both are packaged in 16-SOIC form factor with identical pin pitch and board footprint dimensions. Both operate across the same supply voltage range (2.375V to 5.5V) and extended automotive temperature range (-40°C to 125°C). Both employ capacitive coupling technology and carry equivalent moisture sensitivity ratings (MSL 2A, 4 weeks).

Frequently Asked Questions (FAQ)

Q: Can SI8642BD-AS replace SI8662BD-AS in all applications?

A: The SI8642BD-AS can replace the SI8662BD-AS only in applications requiring 4 or fewer isolated channels. The SI8642BD-AS provides 4 channels (2 forward, 2 reverse) versus the SI8662BD-AS 6 channels (4 forward, 2 reverse). If your design uses all 6 channels of the SI8662BD-AS, the SI8642BD-AS is not suitable.

Q: Are the electrical performance characteristics identical?

A: Yes. Both parts share identical isolation voltage (5000Vrms), data rate (150Mbps), CMTI (35kV/µs), propagation delay (13ns), pulse width distortion (4.5ns), and rise/fall time (2.5ns) specifications. Performance in isolation and signal integrity is equivalent.

Q: Is the package footprint the same?

A: Yes. Both parts use 16-SOIC (0.295", 7.50mm Width) packaging with identical pin pitch and board footprint. PCB layout compatibility is maintained between the two parts.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both SI8662BD-AS and SI8642BD-AS are automotive-grade components with AEC-Q100 qualification. Both operate across -40°C to 125°C and are suitable for automotive applications.

Q: What is the supply voltage compatibility?

A: Both parts operate across the identical supply voltage range of 2.375V to 5.5V. No supply circuit modifications are required when substituting between these parts.

Q: Are there differences in moisture sensitivity or handling?

A: No. Both parts carry MSL 2A rating (4 weeks maximum floor life). Handling, storage, and reflow procedures are identical.

Q: Which part should I select if channel count is not a constraint?

A: If your application requires 4 or fewer channels, the SI8642BD-AS offers higher inventory availability (1398 units in stock versus 926 units). Both parts are active production items with equivalent lead times and supply reliability.